発泡樹脂／Al三層積層材に対する中立バンドモデルの修正と曲げ剛性の解析

抄録

In the previous research, the neutral band model which assumes the undeformed region nearby its neutral plane was devised to estimate the flexural rigidity of a porous resin /Al laminate. In the present research, the neutral band model may be modified as the magnitude of the neutral band factor, which implies the thickness of neutral band, differs from point to point in the beam. By adopting the modified neutral band model to the case for the partial distributed applied load, the neutral band factor can be expressed as a function of the applied length of the distributed load. The magnitude of the flexural rigidity of the porous resin /Al laminate is calculated by equating the applied length to the circular arc length of loading roller of the 3-points bending instruments. The results obtained are good agreement with the experimental ones irrespective of the span length of the 3-points bending test.